学生们用黄色、蓝色或橙色的钢笔或铅笔标出主要思想和重要细节。

Students mark the main ideas and important details with a pen or pencil, yellow or blue or orange.

youdao

学生们用黄色、蓝色或橙色的钢笔或铅笔标出主要思想和重要细节。

Students mark the main ideas and important details with a pen or pencil, yellow or blue or orange.

youdao